Save twice in-game. You know, the fancy menu (using X button) that lets you check Pokédex or Trainer Card. There's a save option there. Use it
Also, Gen 7 saves are not DSVs. use a main from your exported save.
edit: Following Discord, it appears what you said is your save is from Powersaves. Encrypted saves won't do.
For Gen 7, afaik only hacked 3DS's can decrypt them. PKHeX use decrypted saves.

That block is for Records (the little text that shows whether you've received the gift).
You can modify that block, but it doesn't affect in-game redemptions.
Regarding reading the bin from that block, I have a tool here.
Documentation here.
And no, modifying these will not make event redeemable in-game. As I said, these are merely records.
Think of them as a remnant or something left behind, from the process of the event redemption.
Changing this leftover won't change what has already happened (which is the event redemption)
Wonder cards are no longer stored in saves, and the games do not support redemptions from within the saves itself (unlike past gens).
Any event redemptions go directly to bag/party/PC.

Starting from 5th June 2020, a serial code that allows users to redeem a Dynamax Crystal for Gigantamax Copperajah has been made available.
As far as I can tell, the event were announced in European countries, between going to Gamestop or GameMania between 5th June to some early date in July(prior to the DLC launch). (link)(link 2)
The changes done to the Dynamax Crystal populated dens was first observed here (June 02, 2020),
however it's status of it being an official event was not known (think Unreleased Gmax Butterfree Event).
A wonder card for the Dynamax Crystal was later uploaded to the BCAT (June 03, 2020)
It later received confirmation of being an official event (June 05, 2020)
As of time of writing, this event is the only way to get Curse on a Copperajah that can Gigantamax.

that makes sense. yeah stupid Poke Ball Mew -.-
Luckily, now with HOME, I can transfer the one I redeemed on LGPE over
No worries there. I think I only used edizon for shiny cheats in 1.0.0, then it got old real quick..

Hey @AliceTheAlice, good work! Anyway, be careful when pasting over content from another post.
You may wanna copy into a notepad (to clear formatting) before copying over ><
I can only assume you're using the dark theme. The Copied content would have a black background in any theme that isn't the dark theme ><
Example
Anyway I hope I've been able to edit the post properly

Thanks for sharing it.
Is it possible to get a higher quality scan for this? I am not familiar with the dot code conversion process, but looking at the bar below, the pixels are not distinct enough to convert (I assume)

After season 1 of the DLC (Isle of Armor and Crown Tundra), some would think that a second season of DLC will begin.
Others think it's a DPPt remake, and some will think it's DPPt in the form of Let's Go (since the legends were already in Crown Tundra, no need for a serious remake,
but instead go the lighthearted route.)

You know the image above. Do you see the button that says "Import current block"?
yes
yes.
only if you know what you're doing, then you can manipulate your own block.
Else, just take the block from a save that has what you want.
Anyhow, while it doesn't showcase what you want, maybe the steps here can help you:

Depending on how the Max Soup worked, it may give Pokémon from Past Gens the ability to Gigantamax.
Ignoring the entries for any species that is capable of Gigantamaxing, let's take a look at interesting entries,
Specifically, balls that cannot be used in Sword and Shield.
Species
Location
Notes
Sports Ball Caterpie
HGSS National Park: Bug-Catching Contest
To be evolved to Butterfree
Sports Ball Metapod
HGSS National Park: Bug-Catching Contest
To be evolved to Butterfree
Sports Ball Butterfree
HGSS National Park: Bug-Catching Contest
Safari Ball Pikachu
RSE Safari Zone
Cherish Ball Pikachu
Any event that has Cherish Ball
Safari Ball Machop
HGSS Safari Zone: Morning/Day
To be evolved to Machamp
Safari Ball Machoke
HGSS Safari Zone
To be evolved to Machamp
Safari Ball Machamp
Evolved from Machoke
Cherish Ball Machamp
Any event that has Cherish Ball
Safari Ball Gastly
HGSS Safari Zone: Night
To be evolved to Gengar
Safari Ball Haunter
HGSS Safari Zone: Night
To be evolved to Gengar
Safari Ball Gengar
Evolved from Haunter
Cherish Ball Gengar
Any event that has Cherish Ball
Safari Ball Krabby
HGSS Safari Zone
To be evolved to Kingler
Cherish Ball Krabby
Any event that has Cherish Ball
To be evolved to Kingler
Safari Ball Kingler
Evolved from Krabbly
Safari Ball Lapras
HGSS Safari Zone - Surfing
Cherish Ball Eevee
Any event that has Cherish Ball
Cherish Ball Snorlax
Any event that has Cherish Ball
Cherish Ball Munchlax
Any event that has Cherish Ball
To be evolved to Snorlax
(Also for none Cherish Ball entries, it'll be fun to breed the ball and HA onto them )
Additionally, if Gigantamax Melmetal continues to be not distributed by any raids (events or otherwise),
this may be the only way to get Gigantamax Melmetal. (By feeding a Melmetal from PGO the Max Soup)